1389000166640 has 40 divisors (see below), whose sum is σ = 3229966447488. Its totient is φ = 555506981120.

The previous prime is 1389000166607. The next prime is 1389000166663. The reversal of 1389000166640 is 466610009831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1389000166591 and 1389000166600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 972992 + ... + 1929951.

Almost surely, 2^{1389000166640} is an apocalyptic number.

1389000166640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389000166640 is an abundant number, since it is smaller than the sum of its proper divisors (1840966280848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1389000166640 is a wasteful number, since it uses less digits than its factorization.

1389000166640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908937 (or 2908931 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 1389000166640 in words is "one trillion, three hundred eighty-nine billion, one hundred sixty-six thousand, six hundred forty".